Question 1

When neptunium emits a beta particle the result is

Accepted Answer

A) a different isotope of neptunium. 
B) uranium. 
C) plutonium. 
D) lead. 
E) none of the above 
A) a different isotope of neptunium. 
B) uranium. 
C) plutonium. 
D) lead. 
E) none of the above

Question 2

The energy released in both fission and fusion is mainly in the form of

Accepted Answer

A) kinetic energy of fragments. 
B) alpha radiation. 
C) beta radiation. 
D) gamma radiation. 
E) none of the above 
A) kinetic energy of fragments. 
B) alpha radiation. 
C) beta radiation. 
D) gamma radiation. 
E) none of the above

Question 3

In both fission and fusion, mass

Accepted Answer

A) is created from energy of other forms. 
B) converts to kinetic energy. 
C) converts to gamma radiation. 
D) remains the same. 
A) is created from energy of other forms. 
B) converts to kinetic energy. 
C) converts to gamma radiation. 
D) remains the same.

Question 4

Nuclear reactors that produce consumer power in present times are powered by

Accepted Answer

A) fission. 
B) fusion. 
C) both fission and fusion. 
A) fission. 
B) fusion. 
C) both fission and fusion.

Question 5

Fusing two carbon nuclei would occur with

Accepted Answer

A) absorption of energy. 
B) release of energy. 
C) neither of these 
A) absorption of energy. 
B) release of energy. 
C) neither of these

Question 6

Although plutonium alone is chemically toxic, it is not toxic when

Accepted Answer

A) oxidized. 
B) ionized. 
C) subcritical. 
D) none of the above 
A) oxidized. 
B) ionized. 
C) subcritical. 
D) none of the above

Question 7

A sphere of pure U-235 will explode if it is

Accepted Answer

A) hot enough. 
B) shaken hard enough. 
C) big enough. 
D) none of the above 
A) hot enough. 
B) shaken hard enough. 
C) big enough. 
D) none of the above

Question 8

In both fission of uranium and fusion of hydrogen, mass

Accepted Answer

A) decreases. 
B) remains constant. 
C) increases. 
A) decreases. 
B) remains constant. 
C) increases.

Question 9

Fissioning an iron nucleus would occur with

Accepted Answer

A) absorption of energy. 
B) release of energy. 
C) neither absorption nor release of energy 
A) absorption of energy. 
B) release of energy. 
C) neither absorption nor release of energy

Question 10

If oxygen were used as nuclear fuel, it would be best

Accepted Answer

A) fused. 
B) fissioned. 
C) either of these 
A) fused. 
B) fissioned. 
C) either of these

Question 11

The nucleus that has the greatest mass per nucleon is

Accepted Answer

A) hydrogen. 
B) iron. 
C) lead. 
D) uranium. 
E) plutonium. 
A) hydrogen. 
B) iron. 
C) lead. 
D) uranium. 
E) plutonium.

Question 12

According to the "energy valley" of the mass-per-nucleon versus atomic-number graph, the element with the least mass per nucleon is

Accepted Answer

A) hydrogen. 
B) helium. 
C) iron. 
D) uranium. 
E) none of the above 
A) hydrogen. 
B) helium. 
C) iron. 
D) uranium. 
E) none of the above

Question 13

If all the uranium in the world were exhausted, breeder reactors would be

Accepted Answer

A) in greater demand. 
B) relics of a brief age. 
C) both of these 
D) neither of these 
A) in greater demand. 
B) relics of a brief age. 
C) both of these 
D) neither of these

Question 14

Two isotopes that undergo nuclear fission are

Accepted Answer

A) U-235 and Pu-239. 
B) Th-238 and U-235. 
C) all of these 
D) none of these 
A) U-235 and Pu-239. 
B) Th-238 and U-235. 
C) all of these 
D) none of these

Question 15

In gaseous form at the same temperature, the average speed of U-238 compared to the speed of U-235 is

Accepted Answer

A) less. 
B) more. 
C) the same. 
A) less. 
B) more. 
C) the same.

Question 16

The fact that more radioactive particles are spewed from coal-fired power plants than nuclear fission reactors is evidence that

Accepted Answer

A) coal is more radioactive than uranium. 
B) coal-fired plants have less shielding. 
C) coal-fired plants are more numerous. 
D) all of the above 
E) none of the above 
A) coal is more radioactive than uranium. 
B) coal-fired plants have less shielding. 
C) coal-fired plants are more numerous. 
D) all of the above 
E) none of the above

Question 17

Neutrons that will initiate the fission of U-235 require speeds that are

Accepted Answer

A) less than average. 
B) about average. 
C) more than average. 
D) all of the above 
E) none of the above 
A) less than average. 
B) about average. 
C) more than average. 
D) all of the above 
E) none of the above

Question 18

The percentage of electricity from nuclear power generated in recent decades in the United States has been about

Accepted Answer

A) 10%. 
B) 20%. 
C) 30%. 
D) 40%. 
E) more than 40% 
A) 10%. 
B) 20%. 
C) 30%. 
D) 40%. 
E) more than 40%

Question 19

When a lump of uranium is broken into smaller pieces, the total surface area

Accepted Answer

A) decreases. 
B) remains the same. 
C) increases. 
A) decreases. 
B) remains the same. 
C) increases.

Question 20

Fusing two iron nuclei would occur with

Accepted Answer

A) absorption of energy. 
B) release of energy. 
C) neither of these 
A) absorption of energy. 
B) release of energy. 
C) neither of these

Exam 34: Nuclear Fission and Fusion

When neptunium emits a beta particle the result is

The energy released in both fission and fusion is mainly in the form of

In both fission and fusion, mass

Nuclear reactors that produce consumer power in present times are powered by

Fusing two carbon nuclei would occur with

Although plutonium alone is chemically toxic, it is not toxic when

A sphere of pure U-235 will explode if it is

In both fission of uranium and fusion of hydrogen, mass

Fissioning an iron nucleus would occur with

If oxygen were used as nuclear fuel, it would be best

The nucleus that has the greatest mass per nucleon is

According to the "energy valley" of the mass-per-nucleon versus atomic-number graph, the element with the least mass per nucleon is

If all the uranium in the world were exhausted, breeder reactors would be

Two isotopes that undergo nuclear fission are

In gaseous form at the same temperature, the average speed of U-238 compared to the speed of U-235 is

The fact that more radioactive particles are spewed from coal-fired power plants than nuclear fission reactors is evidence that

Neutrons that will initiate the fission of U-235 require speeds that are

The percentage of electricity from nuclear power generated in recent decades in the United States has been about

When a lump of uranium is broken into smaller pieces, the total surface area

Fusing two iron nuclei would occur with

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